Chain rattle vs. detonation sounds - Saab 9000 Bulletin Board - Saabnet.com
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Chain rattle vs. detonation sounds
Posted by Rod'899kT (more from Rod'899kT) on Sun, 1 Jun 2003 08:23:14
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This week, my '89 9kT started making a rapid knocking on light acceleration under load -- like climbing a hill. Letting off slightly on the gas pedal stops the knocking. This isn't at full throttle so is it likely to be detonation? Because it isn't all the time -- or on cold start-up -- it doesn't seem to me that it should be a loose timing chain. So far I've checked the plug gap, replaced the fuel filter. Next I'm trying to reset the timing, but haven't been able to see the timing marks on the flywheel, so I can't rule that out yet. How obvious are they???
Any ideas what this sound is from?
Thanks,
Rod.
'89 9000T, 5-speed
posted by 206.75.18...
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